Environment is degraded through the depletion of resources like air, water and soil. It leads to destruction of ecosystem and extinction of wildlife. It is a global issue and has been debated over a decade.
(i) Pollution in one country may effect the other in form of acid rain, climate change etc.
(ii) Deforestation in some countries may disturb the rainfall pattern in the surrounding countries.
(iii) Land degradation and dam burst can bring massive siltation and flood like situation.
Thus, consequences of the actions of one state or country may affect others, this proves that environmental degradation does not respect land boundaries.